A Language Accessory Pack (LAP) allows you to change the display language, help language, and proofing tools (spell check, grammar) for Microsoft Office applications like Word, Excel, and PowerPoint.
Once installed, follow these steps to activate the language:
To "patch" the language pack for stability, security, and performance, you should install the Service Pack 2 for Microsoft Office 2010 Language Pack (KB2687449) .
: Users can toggle between English and Arabic via the Office Language Preferences tool.